Involuntary Trap Face

So, I've started trying to build my trapesius muscles. My neck is long and now that my broad shoulders are also becoming toned shoulders, the giraffe look isn't cutting it.During an adventure where I decided to stand with weights and raise my shoulders, I noticed something: Face! What are you doing!?This particular workout doesn't particularly hurt, but to look at the way my mouth was twitching you'd think I was trying to lose weight via amputation. The first thing I did was worry for about three seconds until I realized it was a muscle reaction. Then I tried to conceal it...Which turned :/ into ;{. Worse! Eventually I was just making faces in the mirror.

A few days later, it happened to someone else. The twitch, the "what if I try to frown instead...nope its still twitching" face. I have seen two more, and am calling this the "trap face".

Do any of you do this? Did you overcome it? What emote best describes it?